What is the S.I. unit of the quantity which the pitch/shrillness of sound depends upon?
A
hertz
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B
metre
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C
metre/second
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D
decibel
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Solution
The correct option is A hertz The quantity on which the pitch of sound depends, is called frequency. Frequency is no. of oscillations made by each particle in the medium when sound propagates through it. Its S.I. unit is per second (s−1) or hertz (Hz). 1s−1=1Hz